Interactive Display Unit

1. An interactive display unit for at least one of presenting information and interaction with a user, comprising: at least one imaging cell which comprises a photorefractive polymer material layer between two transparent substrate carriers in a sealing arrangement, each transparent substrate carrier being provided with a transparent electrode layer located on a surface of the photorefractive polymer material layer, wherein the transparent electrode layer is controlled to apply voltage to the photorefractive polymer material layer to cause a photorefractive effect; at least one writing light source, with a propagation that is directed in the direction of the photorefractive polymer material layer, arranged on one of the transparent substrate carriers parallel thereto; and a haptic sensor-actuator unit and, laterally, at least one reading light source, with a propagation that is directed in the direction of the photorefractive polymer material layer, arranged on the other transparent substrate carrier.

2. The interactive display unit as claimed in claim 1 , wherein the haptic sensor-actuator unit is arranged on an outer side of the other transparent substrate carrier, which is remote from the writing light source and the photorefractive polymer material layer.

3. The interactive display unit as claimed in claim 1 , wherein the haptic sensor-actuator unit is formed from a large number of alternately arranged actuator layers and electrode layers.

4. The interactive display unit as claimed in claim 3 , wherein the actuator layers and the electrode layers are in each case formed from an optically transparent material.

5. The interactive display unit as claimed in claim 4 , wherein the optically transparent material of the actuator layer is a conductive polymer.

6. The interactive display unit as claimed in claim 3 wherein the haptic sensor-actuator unit is divided into fields which are controllable using the electrode layers at least one of individually and in groups.

7. The interactive display unit as claimed in claim 1 , wherein an outer surface of the haptic sensor-actuator unit which is remote from the photorefractive polymer material has a protective layer.

8. The interactive display unit as claimed in claim 1 , wherein the reading light source comprises a plurality of light sources having different emission spectra, wherein the reading light source generates light of a frequency that is different from the frequency of the writing light source.

9. The interactive display unit as claimed in claim 1 , wherein a micro-lens field is arranged between the writing light source and the one transparent substrate carrier, which micro-lens field comprises a plurality of micro-lenses having identical dimensions, which micro-lenses are arranged in a grid in mutually perpendicular rows and columns next to one another or in a hexagonal grid.

10. The interactive display unit as claimed in claim 9 , wherein an optical diffuser and an optical modulator are arranged upstream of the micro-lens field in the radiation direction of the writing light source.